Chapter 1: Overview

ODL syntax

ODL syntax uses keywords that you cannot use in variable or function names. ODL also provides a fixed set of datatypes with decimal, string, and blob used as predefined ODL classes.

Table 1-1 lists ODL keywords. Table 1-2 list ODL datatypes.

**Table 1-1: ODL keywords**
_cdecl	define	goto	objects	switch
arguments	deinit	idempotent	operator	symoff
auto	dll	if	out	text
blob	do	in	private	token
break	double	include	procedure	typedef
bysymbol	else	init	protected	union
callbacks	end	inline	public	unsigned
case	enum	int	register	value
class	extern	interface	return	version
const	flavor	lcldefine	sizeof	virtual
continue	float	module	static	void
controls	for	new	string	volatile
default	friend	object	struct	while

**Table 1-2: ODL datatypes**
Type	Format	Size in bytes	Value range
Binary Large Object	blob	< = 4GB	Variable
Character	char	1	0x00 - 0xff or + -127
Decimal	decimal	Up to 64K	A data variable of type decimal may contain up to 65535 characters with the decimal point located anywhere within those characters.
Floating Point	float	8	Platform dependent
Integer	int	4 bytes	+-32767: 0 - 65535
Long Integer	long	4 bytes	+-32767: 0 -65535
Pointer	type	8 bytes
Short Integer	short	Varies	+-32767: 0 - 65535
String	string	Up to 64K	Variable
Structures	struct
Symoff	symoff	Varies	Integers 1 - 65535
C Pointer	_cdecl char*	4 bytes,

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